Thread-cutting mechanism for looms.



J. G-EEVRBTT THREAD CUTTING MECHANISM FOR LOOMS.

APPLICATION FILED DEO.11, 1908.

Patented Apr. 19, 1910.

'uNiTED STATES rg gnur onerou- AUG'US TIN J. CHEVRETTE, OF WORCESTER, MASSACHUSETTS, ASSIG-NGR T CROMPTON & KNOWLES LQOM WORKS, A CORPORATION OF MASSACHUSETTS.

THREAD-CUTTING MECHANISM Fon- LOOMS.

Specification of Letters Patent.

' Patented Apr. 1a, 1910.

Application filed December 11, 1908. Serial in. 466,974.

T 0 all whom it may concern:

Be it known that I, AUGUSTIN J. CHEV- nnrrs, a citizen of the United States, residing at \Vorcester', in the county of Worcester and State of Massachusetts, have invented certain new .and useful Improvements in Thread-Cutting Mechanism for Looms, of which the followin is a specification.

My invention re ates to a thread cutting mechanism for looms, and particularly for weft replenishing looms, in which it is neces sary to cut the fillingor thread, after a bobbin .has been inserted into a shuttle to take the place of e practically or substantially exhausted bobbin. I,

r The object of my invention is to provide an improved thread cutting mechanism for looms of the class referred to, having a stationary jaw, and a movable jaw, bot-h mounted in front of the lay, and having mechanism to positively move the movable jaw into operative position to out the thread on the backward movement of the lay, andto allow the movable jaw to be moved into its inoperative position on the forward movement of the lay;

I preferably combine any improved thread cutting'mechanism with a loom temple of any ordinary construction, but it may be usedindcpendently of and separate from the loom temple. H

I have shown in the drawing a detached portion of a loom, and a loom temple, and my thread cutting mechanism combined therewith, suflicient to enable those skilled. in the art to understand the construction and operation thereof.

Referring to the drawing :Figure 1 is across sectional view of the breast beam, and the lay of a loom, with a temple and my thread cutting mechanism combined therewith. The temple is shown in the position it occupies when the thread is being cut. Fig. 2 is an inner view of the breast beam, and the temple and my thread cutting mechanism,and parts connected tl1erewit-h,shown in Fig. 1, lookii'lg in the direction of arrow a, same figure: Fig. 3 is, on an enlarged scale, a section on line 3, 3, Fig. 2, looking in the direction of arrow 6, same figure, showing the cutting mechanism detached.

fln the accompanying drawing, 1 is the breast beam, 2 the lay, 3 the reed, 4: the hand-rail.

5 are two warp threads.

The loom temple in this instance consists ing movement therein. The bar 7 has the enlarged portion or head 7 to receive a bolt 8, on which. is mounted, to have a rotatable motion, the roller or bur 9. A nut 8- is secured on the bolt 8. The cap 10 is adapted to extend over the roller 9, and is hinged at 9 onan ear 7 on the head 7 A plate 11 and screw 12 hold thecap 10 in position.

Allof the above mentioned parts may be of the'usual and. well known construction in loom temples.

'I will now describe my improvements in thread cutting mechanism. v The upwardly extending portion 10 of the cap 10 which extends over the roller 9,

is slotted at 10 to receive a downwardly extending steel blade 13, which is secured at its upper end, in this instance by two rivets 14 in the. cap '10, see Fig. 3. The lower end of the blade 13 is turned out wardly, as shown at 13, Fig. 3, to form one member or jaw of the cutting mechanism. A second steel blade, in the form of a lever 15, extends into the slot 10" in the cap 10, and is pivotally mounted on a stud 16. One arm. of the lever 15. extends toward and above the temple roller 9, see Fig. 3, and also downwardly, as shown at l5,"to form the second member or jaw of the cutting mechanism. The other arm of the lever 15 is provided at its end with a stud 17 around which is bent the lower end of a spring wire 18.; the upper end of the spring Wire 18 is coiled around a stud '19 on the cap 10. The spring 18 acts in this instance to yieldingly move downwardly the outer arm of the lever 15, and consequently move upwardly the end 15, to open the jaws of the cutting mechanism, as shown in Fig. 3.

The outer arm of the lever 15 is adapted in this instance to be engaged by a roll 29 on a stud 21 on an arm 22. -The arm 22 has its hub 22 adjustably secured by a bolt 23 near one end of a horizontally extending rock shaft 24. Each end of the shaft 24 is in this instance mounted .in a boss 25 on a stand 25, secured in this instance to the inner side of the breast beam by a screw 26, see Fig. 2. The other end of the shaft 24 has secured thereon in this. instance the hub 27- of a end of a stand 3G'secured to the underside of the lay beam 2.

When the lay 2 moves to its rear position,

' as shown in Fig. 1, the raising of therod 27 will rock the shaft 2 and the lever thereon, and cause the roll 20 to engage the outer arm of the lever .15 and raise said arm, and consequently move down the inner arm, and bring together the two cutting jaws, and when. a filling thread is between said jaws, cut the filling. As the lay moves forward to the position shown by broken lines in Fig. 1, the rod 27 is lowered, and the lever 15 is released .to allow the spring 18 to actto open the cutting jaws, as shown in Fig. The advantages of my improvements will be readily appreciated by thoseshilled in the art.

At every backward movement of the lay, the movable member of the cutting jaws or surfaces, is positively moved to cut the thread. cxtcndin between the cutting "aws.

and as the lay moves forward, the movable member of the cutt ng FLWS' 1s released, and -allowed to move, to open the gaws or cutting surfaces, and release the thread.

It will be understood that the details of spring for moving the movable cutter, of a' rock shaft mounted on the breast-imam, anarm on said shaft to move said movable cutter, and a second arm on said shaft extending toward the lay, and adapted to be moved through the movement of the lay, to cause the movable cutter to be moved into operative position on the backward movement-of the lay.

2. In a thread cutting mechanism, the combination with a reciprocating bar monnh ed on the breast beam, and having thereon a temple bur or roller, a stationary. cutter, a pivotally mounted cutter, and a spring for moving the pivotally mounted cutter, of a rock shaft mounted on the beam, an arm mounted on said. rock shaft to engage and move "said pivotally niountedcutter, a second arm mounted on said roch shaft and extending toward the lay, and adapted to be engaged and moved by an armor roll carried; on the lay, to cause said pivotally mounted cutter to be moved into operative position on the backward movement of the lay, p

In a thread cutting mechanism, the combination with a r'eciproca ting bar, a cutter fast on said bar, a cutter mo ably mounted on said bar, a spring for moving said movable cutter in one direction, an arm pivotally mounted on the breast beam, to move said movable cutter, and a second arm connected with said first mentioned arm and adapted to he moved through the movement of the lay, to cause the movable cutter to be moved 7 into operative position to cut the thread on. the backward movement of the la".

4:. In a thread cutting mechanism, the combination with a reciprocating bar, a cutter fast on said bar, a cutter pivotally mounted on said bar, spring for moving said pivotally mounted cutter in one direction,

an arm pivotally mounted on the breast beam, to move said pivotally mounted cutter, and a second arm connected with said" first mentioned arm and adapted to be moved through the movement of the ray, to cause the pivotally mounted cutter to be moved into operative position to cut the thread on the backward movement of the lay.

AUGLv J. GEEK BETTE.

Witnesses JOHN C. Downy, M. Haas. 

